Two-post, two-speed, three-shaft portable drawworks



Dec. 9, 1930.

' Two-Pos1', Two-SPEED, THREE-SHAFT PORTABLE DRAwwoRxs' 'Filed oct. 24. 1927 2 sheets-sheet 1 33nd. f'.

E. TlMBs ET Al.. I 1,783,988

D 9 19830- l n E. TlMBs ETAL 1,783,988

TWO- POST TWO S PEED THREE SHAFT PORTABLE DRAWWORKS F11-ed oct. 24, 192'.7 V 2 sheets-sheet 2 i l gwucnfoz P'eieegea Dee. e, 1930 KuNl'rifzn"STATES4 PATENT onirica iinwm runas, or mantenu, um mgwis'n mn, or noma, caniromlu, assieirons To 'rmi narioiur. sunny conm or nmwann, or nrw roux,

N. Y., A CQBPORATION F Dmwm PORTAIL! DMWWOBIB This invention relates' to rotary fdrawworks, such as are employed in the drilling of wells for ,voil, and t e like,rand is more particular y vrelated to a rotary drawworks l of com aratively light, compact structure adapte to be used in connection with a portable drilling outfit or the like and which may be readily transported from position t0 p0- sition', as desired.

.10 In the construction of drawworks forguse in connection with the apparatus employed for drillingwells, and particularly oil wells, three maj or problems present themselves, the

first of which is to rovide a construction which is compact so t at the operative parts of the drawworks willliiotbe movedtoo far from the center of the drillin rotary machine mounted aria yo the hole being drilled. .The second problem which presents' itself is .toprovide a construction which is relativelyA inex nsi've and which is rigid or sturdy and wi support relatively-A heavy loads such, for example, as loi'xstrings of casing, drill stems, and the like. problem i's to. provide a drawworks construc tionwhich is relatively exible and will permit operation from a-single point in the well y i'igand which .lrovides a plurality-of speeds so as'to enable t e driller 'to' control the operation of the same, de .formation Lbeing drilled through, the artie ular drilling operation in pr construction of a portab e awwork's, the

eavy and which may be entirely mounted upon skids or the like so as to permit the same to be'moved as aunit -ii is, iiierefoie, en object of this invention to provide arotary drawworks which is ofcompact, structure, which will provide a satis` factory range of flexibility and which includes -a pair of tsa'nd supportin beams upon which the rum. shaft, hne sha andaN countershaft are rotatably supffiisrted, there4 in driven and riving relation so as to provide-the compact and flexible structure desired.

bein means connecting l the s lia Another object. of this invention is to ro go'vide An. rotary drawworks including a ri and the ethird ding upon thekind of ess an in thek rovision' of a structure which is not too" stnicture on which a pair of posts are supported and between which beams are secured,

posts, and the line shaft an countei' sha,ft

are rotatably( supported hy the said beams there also means for connecting the said shafts in iven and driving relation so as to Anotherobje'ct of this invention is to rovide a rotary drawy'vorks including t ree shafts mounted-'upon a frame structure in luding two'posts and between which shafts drivnrilneans are provided to provide a twopeed ve for the drum shaft of the rotary rawworks', the drum of the ary drawworks being loosely journaled on the drum shaft to permit the same to turn freely without requiring o ration of the connecting and driving meanstween the shafts, the entire structure being so formed as to permit the saine to be mounted on skids or the like-to provide a unit structure which is readily tra' rtable. l

Ot er objects and advantages ofthis invention, it is believed will'be apparent from the following deeeilei deeeription of e preferred embodiment thereof, as -illustrated in the drawings. o

A In the drawings:

Figure lis a top plan view of a rotary drawworks embodying this invention.

Figure 2vis a front elevation thereof, cer tain parts being broken awa Fig. 3 is a e elevation t ereof.

In the pre erred embodiment of this invenpermit of relatively great exibility of operal tion, as illustrated intlii accompan g `cured -together attheirpoglposite ends A'by means of transversely exten ng'frame chan` nel irons 3 and.- 4. Secured tothe forward ends ofi the base ship-channels 1".and 2 are;

substantially upright posts i5 and (.y The posts 5 and 6 are secured vthe'channels 1 and 2 by means of lates? in position slighte Y,

Iy inclined forwar from the vertical.

line shaft supporting v l frame is provided at' the rear of the posts 5 nels 1 and 2, respectively and 6 by'braceship-channels 8 and 9 which are connected at their lower ends to the chanby means ofplates 10 and at their upper ends to the posts 5 and 6, respectively, by plates 11.. The osts 5 and `6 are secured to ether' at or near t` eir Vu per ends by means o angle irons 12 and 13, w 1ch are secured at their opposite ends to the posts Acustom by providin a drawworks including a frame structure t at first had to be accu-O rately positioned in the wellin definite relat1on to the rotary drawworks, crown block and the like, thereof.

v/ A drum shaft 14 is supported on the front faces of the osts 5 and 6 in bearings 15 and 16, which) are preferably -of the self-v aligning type. .Mounted on the drum shaft is a drum 17 which may be of any suitable -or desirable construction. The drum V17 is herein illustrated as including a s ool portion 18 havingintegral anges 19 ormed at .its opposite ends and bearing race portions 20 within which roller bearings 21 are mounted tojournal the drum 17 on the shaft 14. The shaft 14 is driven by means of'a' sprocket 22 lwhich is secured thereto between the post 5 and the flange of thedrum .17. at this end of the drawworks. In order to hold the drum 17 properly .positioned upon the shaft 14 and. to prevent endwise motion of the same, a spacer collar 23 is mounted between the hub of the sprocket 22 and thebearing race por-` tion 20 of the drum 17 Means are rovided for engaging the drum 17 with the s aft 14, which means preferably Y comprises a clutch 24 of the jaw type permittmg the drum'17 to be engaged with the shaft 14 to rotate the drum 17 1n either direction. The clutch jaw faces of the clutch 24 are preferably formed integral with one of the bearing race-portions 20, as indicated at 25, and on the ad'acent face of a clutch .collar 26 which is s idably splined on the shaft 14 in such a manner as tosubstantially lill the shaft 14 between the posts 5 and 6 so that at this end of the shaft 14 the drum is also revented vfrom moving longitudinally of the Ishaft. Y

'Any suitable or desirable form of meansmaybe providedjor actuating the clutch col' lar 26, which means-are herein illustrated as D comprising a yoke 27 which e ages within ythe race v28`formed in th'e'clutc collar rand.

is' pivotally mounted by a pin 29 ona bracket' "shown, trained over the 30 Secured totthe 'post 6. The clutch collar 26 by this manner of construction extends into the brake drum 31, secured to the ange" 19 of the drum 17 adjacent the post 6, thereby permitting the spool-I8 of the drum to -be formed of a maximum length determined by the distance between the posts 5 and 6. The yoke 27 is 1plivotally secured by a` pin 32`to 'a rod 33 w 'ch in 'turn is pivotally secured by the pin 34 to the arm 35 of an actuating pedal 36. The actuatin pedal 36 is pivotally mounted on asha. 37 secured to the frame member 4. y Mounted in bearings 38 and 39 at the upper ends of the channel irons 8 and 9 is a line shaft 40. This shaft is in avertifcal plane displaced laterallyfrom a line joining the posts. The bearings 38 and 39, like the bearings 15 and 16 and the bearings 41 and 42 within which thejack shaft 43 is journaledi.'y -at the lower ends of the channels 8 and. 9

may all be of the self-ali ing type.

The line shaft 40 is driven through either of the sprockets 44 or 45 4from any suitable or desirable engine, motor or the like, as isi commonly employed for the driving of rotary drawworks.. .The sprockets 44 and 45 are provided and lare of different diameters and have different numbers of teeth formed thereon so as to permit the line shaft 40tot be driven at different speeds. Means are pro` vided for drivingthe jackashaft 43 from the line shaft 40, which means4 referably' comprise sprockets 46 and 47 whic "are journaled upon the line shaft 40. Clutches 48' and 49 are provided for engaging `the lsprockets 46 and 47, respectively, with the line shaft 40. The jack shaft 43 is driven from the line shaft 40 by means ofchains,

not shown, from the sprockets 46 and 47 to sprockets 50 and 51 secured to the jack shaft 43. The drive provided by the sprockets" 46 and 50 provide a high speed drive, and the drive provided by the sprockets 47 and 51 provide 'a low speed drive. In. order to permit the drive connection between the-line shaft 40 and the jack shaft 43 .-to be. made so that the jack shaft 43 may be driven in either direction from the line shaft 40, the clutch a 48 is preferably of the jaw type. In order Secured totheujack"'shaft 43 is a- -drum fils to permitthe .jack shaft 43 to be driven from shaftdrive sprocket 52 by means of which the drumshaft 14 is driven by a chain, not

sprocketl 22 secured to the drum'shaft 14. f'

directly yfrom the line sha 40 so that when it is desirable only to actuate the.. rotary machine, none of theother operative lparts ofI the rotary drawworks are required to be in ,The rotary machine is referably driven f 125 v type are sog-well understood in the art that journaled on the line shaft and a .clutch 5a of'any suitable or desirable type isl provided for engaging the sprocket 53 with the lme shaft 40. The rotary machine, not shown, is driven from the sprocket 53 by means of a chain likewise' Vnot shown, but

Sin'l a manner well'understood in the art.

Catheads 55 and '56 of any suitable or desirable form are secured to the line shaft 40 on the outside of the posts 5f and 6, re

i spectively'.

Brake means are provided which may be of `any suitable or desirable type or form of construction and are herein illustrated ascomprising the brake drum 31 and the brake drum 57 which are secured 'to the opposed flanges 19 of the drum 17.v Mounted on the brake drums 31 and 57 are brake bands 58 which are ,actuated by any suitable" or desirable form. of means such, for example, as the control illustrated at '59 at the rearv of the drum 17 Any suitable or desirable form of means such as is well understood'in the art may be provided for actuating the respective clutchesl mounted on the line shaft 40. Means for actuating clutches of this .it is not deemed necessary to particularly point out .and describe the same.

By placing the bearings for the line shaft 40 on the inclined braces or struts 8, the drawworks is made morecompact, at. the same time permitting the nry distance between the line shaft and the drum shaft 1 The lowering of the .level'of the line 40 is also advantageous, because it A ,lowers the line ofpull of the drive chain for I" tion of a frame structure including a v chain.

driving the line-shaft from the engine. This greatly reduces the strains on the frame of the drawworks and enables a lighter frame to .be employed. It also reduces the vibration effects on the drawworks from the drive It also has the desirable effect of shortening the length ofthe drive chain Vfrom the line shaft to the iack shaft.

Having fully describedvour invention, it is to be understood that we do not wish to be limited to the details herein set forth, but our invention is of the full scope of the appended claims. I l A:

.- We claim 1. In a rotarydrawworklg the 1r o spaced base frame members, substantie y upnghtposts secured to the base frame members, a pair of inclined brace frame, members securedat their ends tothe posts and the base frame member, a'drum shaft, means lca for rotatably supporting the drum shaft on the posts, vsupporting the line shaft on the brace frame members on a vertical line removed laterally from a line join' the posts, a jack shaft, means for rotata y supporting the jack shaft on the: frame members below the and clutch' means for releasably a line shaft, means for rotatablymeans fordriving the line shaft, driving the jack shaft from the the drum line shaft, means for line shaft, and means for driving shaft from the jack shaft. v

' 2. In a rotary drawworks, the combination of a frame comprising two triangular end frames having diagonal back brace members, andincluding a pair of substantially upright spaced posts connected to the brace members, a drum shaft rotatably supported on said post-s, a line shaft rotatably journaled Vin-bearmgs on said frame above the drum shaft and on a vertical line removed laterally from a linejoining the posts, a ]ack` shaft rotatably journaled in bearings on lsaid back brace 'members below and to the rear' of thel drum shaft, means for driving the line 3."In'a rotarydrawworks, Vthe combinay tion of a frame consisting of two triangular end frames with diagonal back brace members and forward posts connected to the -brace members, a drum shaft journaled in,bearings on the posts,'a line shaft rotatably supported in bearin on the brace members above and toward e rear side of 'the drum shaft, a shaft journaled in bearings on the brace members to the rear of the drum shaft, and mechanism located between said end frames including means for driving the line shaft, a rotary drive sprocket journaled on the line shaft, clutch means for releasably connect# inl the rotary drive sprocket to the line shaft, a ow speed drive connection from the line shaft to the jack' shaft, a higher speed drive connection from the l1ne shaft tothe jack shaft, clutches on the line shaft for the low and higher speed drive connections means for driving t e drum shaft from the jack shaft a drum j'ournaled on the drum shaft,

securing theA drum to the drum shaft.

4. In a rotary drawworks, the combination of a frame compr two .triangular end frames with diago ba a drum shaft journaled in bearings on the frame, a TLine shaft-rotatably supported vin on the diagonal back brace members above the drum v removed laterally from the vertical plane l throu the drum shaft, a jack shaft ourn ed in w y on the-cliv a1 back, race members to the rear of the shaft, means for driving the line shaft, means for driving the jack shaft from the line shaft,- and means for the drum shaft from the shaft.

Signed at Torrance, California, this 13th dayfof October, 1927.l A'

EDWARD Tures. LEwIs E. zEsBE.

nal ckbrace members,

shaft and located in' a plane 

